Cloth-presser-lifting mechanism for sewing-machines.



G. M. BAMES & J. S. PINGH. CLOTH PRES SER LIPTING MECHANISM FOR SEWINGMACHINES.

APPLICATION FILED APR. 89, 1909.

Patented Jan 4, 1910.

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//V I/E IV 7055 @6 05 204k WITNESSES:

G. M. BAMES 6: J. S. FINGH. CLOTH PBBSSBR LIFTING MECHANISM FOR SEWINGMACHINES.

APPLICATION IILED APB. 29, 1909.

Patented Jan. 4, 1910.

2 SHEETS-SHEET 2.

INVENTORS 550g; 2562mm 0 2,72 -Zwafi BY ,4 2; b,

ATTORNEY WITH/E8858.

gz/Z E1267 munlW u c "UNITED PATENT OFFICE.

GEORGE M. EAMES AND JOHN S. FINCI-I, OF BRIDGEPORI, CONNECTICUT,ASSIGNORS TO THE SINGER MANUFACTURING COMPANY, A CORPORATION OF NEWJERSEY.

CLOTH-PRESSER-LIFTING MECHANISM FOR SEWING-MACHINES.

Specification of Letters Patent.

Patented Jan. 4, 1910.

Application filed April 29, 1909. Serial No. 492,977.

To all whom it may concern:

Be it known that we, Gnonon M. EAMES and JOHN S. FINCH, citizens of theUnited States, residing at Bridgeport, in the county of Fairlie-Id andState of Connecticut, have invented certain new and useful Improvementsin Cloth-Presser-Lifting Mechanism for Sewing-Machines, of which thefollow ing is a specification, reference being had therein to theaccompanying drawings.

This invention relates to cloth -presser lifting mechanism for sewingmachines, and has for its object to provide additional space in the headof the overhanging arm to better accommodate the action of the commonlytermed link take-up.

Further objects of the invention are to provide adjusting means forcontrolling the movements of the presser-bar and to provide a stationarymember upon which the presserlifter bracket may be mounted to movevertically.

Referring to the accompanying drawings, in the several figures of whichlike parts are similarly designated, Figure 1 is a front end elevationof the head of the overhanging arm of a sewing machine equipped with theimproved mechanism. Fig. 2 is a rear side elevation of Fig. 1, togetherwith a portion of the overhanging arm. Fig. 3 is a view in perspectiveof the resser-lifter bracket. Fig. 41 is a view in perspective of thestationary guide-rod upon which the presserlifter bracket is mounted tomove vertically. Fig. 5 is a view in perspective of the pinchcollarsecured to the upper end of the presserbar and upon which thepresser-bar spring acts to resiliently hold the cloth-presserdown uponthe material.

1 represents the head of the overhanging arm of the sewing machine, 2the arm, 3 the main or needle-bar driving shaft, .1 a flange carried bysaid shaft, 5 the needlebar carrying an eye-pointed needle 6, and 7 theneedle-bar actuating link which is secured at one end to the needle-bar,its 0pposite end being operatively connected with the shaft flange 1.The needle-thread take-up 8 is pivoted at 9 to the head 1 and at itsinner end is operatively connected, through the link 10, with the flange1.

11 represents the commonly-employed needle-thread tension.

The presser-bar 12 is mounted in a hearing 13, secured by screw 14 inthe lower portion 15 of the head 1, and is provided at its lower endwith the usual presser-foot 16. To the upper end of the presser-bar issecured, by screw 17, a pinch-collar 18 provided with a lug 19 whichpasses through a slot 20, formed in the presser-lifter bracket, and alsothrough a second slot 22 formed in the stationary guide-rod 23. Saidguide-rod at its lower end is mounted in a suitable seat, formed in thelower portion 15 of the head 1, and is held in adjusted position by ascrew 24., the upper end of said rod extending into the adj ustablymounted cupped bushing 25 which is of common construction.

The rod 23 provided with a tubular portion 26 in which is mounted thepresserbar spring 27, said tubular portion extending downwardly to thelower end of the slot 22. The lower end of the sprin 27 rests upon thelug 19 of the collar 18 and its upper end abuts against the inner wallof the head 28 of the bushing 25, thereby effecting an adjustment ofsaid spring which, through the connections previously pointed out, givesto the resser-foot 16 the required pressure.

The resser-lifter bracket is constructed with a main tubular portion 29and is mounted to move vertically upon the guide-rod 23, the lower endof said tubular portion being provided with a step 30 which contactswith the underside of the collar 18 to lift the presser-bar 12 wheneverthe cam portion 31 of the presser-lifter 32 is caused to act upon thelug 33 formed integral with said tubular portion.

Extending out from the tubular portion 29 is an arm 3-1 provided with alug 36 which, when moved upwardly, acts upon a plunger 37 to release thetension 11 in a manner common to earlier devices, the head of the screw38 assisting to guide said arm in its vertical movements.

As previously stated, the lug 19 passes mounted to move vertically in asuitable bearing located in the lower portion of the head of theoverhanging arm, said presserbar being located below the medianhorizontal plane of said arm; an adjustably secured guide-rod providedwith a springpocket and a guide-slot; a presser-lifter bracket providedwith a guide-slot mounted to move vertically on said rod; a springmounted in said pocket and held depressed therein; and a lugcarried bysaid presserbar and extending through said guide-slots, the inner end ofsaid lug comprising a seat for said spring, substantially as described.

2. In a-presser-lifting mechanism for sewing machines, a cloth-presser;a presser-bar mounted to move vertically in a suitable bearing locatedin the lower portion of the head of the overhanging arm, said presserbarbeing located below the median horizontal plane of said arm; anadjustably secured guide-rod provided with a springpocket and aguide-slot; a presser-lifter bracket provided with a guide-slot mountedto move vertically on said rod; a tension releasing arm; a springmounted in said pocket and held depressed therein; and a lug carried bysaid presser-bar and extend ing through said guide-slots, the inner endof said lug comprising a seat for said spring, substantially asdescribed.

3. In a presser-lifting mechanism for sewing machines, a cloth-presser;a presser-bar mounted to move vertically in a suitable bearing locatedin the overhanging arm; an adjustably secured guide-rod provided with aspring-pocket and a guide-slot; a presser-lifter bracket provided with aguideslot mounted to move vertically on said rod; a spring mounted insaid pocket and held depressed therein; and a lug carried by saidpresser-bar and extending through said guide-slots, the inner end ofsaid lug comprising a seat for said spring, substantially as described.

In testimony whereof, we have signed our names to this spec fication,,1n the presence of two subscribing w tnesses.

GEORGE M. EAMES. JOHN S. FINCH.

Witnesses:

STANLEY N. SMITH, ABBIE M. DoNrHEE.

